sideline
UK: ˈsaɪdlaɪn | US: ˈsaɪdlaɪn
n. a secondary activity or source of income
n. either of the two lines marking the boundaries of a sports field
vt. to remove someone from active participation (e.g., in sports or work)
The word "sideline" combines "side" (from Old English sīde, meaning "flank" or "lateral area") and "line" (from Latin linea, meaning "string" or "boundary"). Originally used in sports to denote the boundary lines on a field (early 19th century), it later evolved metaphorically to describe secondary activities or roles (late 19th century). The verb form emerged in the 20th century, reflecting the idea of moving someone "to the sidelines" and out of active involvement.
She runs a small bakery as a sideline to her main job.
The player was sidelined for three months due to an injury.
The ball went out of bounds near the sideline.
He decided to sideline his artistic pursuits to focus on his career.
The coach sidelined the star player for breaking team rules.